Uneven green space distribution may lead to environmental injustice. This study includes three Chinese towns to explore quantitative method of uniform distribution of urban green space in combination with Gini Coefficient theory. Three quantitative indices have been used to analyze green space planning distribution pattern. The indices reveal horizontal and vertical distribution patterns of green space in these three towns. Distribution pattern of green space composite structure of Hezhuang town is very uneven, distribution pattern of the green space composite structure of Xuedian town is reasonably even, and distribution pattern of the green space composite structure of Lihe town is absolutely even. Based on a contrastive analysis, four conclusions and one recommendation have been drawn. This paper improves the understanding of factors influencing the distribution patterns of town green spaces by providing a basis for judgment of urban environmental equity and a reference for more equitable green space planning.